Transmit Power Optimization and Feasibility Analysis of Self-Backhauling Full-Duplex Radio Access Systems - 2018


We tend to analyze an inband full-duplex access node that is serving mobile users while simultaneously connecting to a core network over a wireless backhaul link, utilizing the same frequency band for all Communication tasks. Such wireless self-backhauling is an intriguing possibility for the following generation wireless systems since a wired backhaul connection would possibly not be economically viable if the access nodes are deployed densely. In particular, we tend to derive the optimal transmit power allocation for such a system in closed form underneath quality-of-service (QoS) requirements, that are outlined in terms of the minimum knowledge rates for every mobile user. For comparison, the optimal transmit power allocation is solved conjointly for 2 reference scenarios: a purely 0.5-duplex access node, and a relay-type full-duplex access node. Primarily based on the obtained expressions for the optimal transmit powers, we then show that the systems utilizing a full-duplex capable access node have a fundamental feasibility boundary, which means that there are circumstances underneath that the QoS needs can not be fulfilled using finite transmit powers. This basic feasibility boundary is also derived in closed type. The feasibility boundaries and optimal transmit powers are then numerically evaluated so as to match the different Communication schemes. In general, utilizing the purely full-duplex access node results in rock bottom transmit powers for all the communicating parties, though there are some network geometries below which such a system is not capable of reaching the desired minimum information rates. Likewise, the numerical results indicate that a full-duplex capable access node is best fitted to comparatively little cells.

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